My memory is fuzzy. It might have been Narse driving. The long and short is they were driving like fucking lunatics and got T boned or some shit like that, Athus died.
I really did feel bad about this. Although he was kinda shitty, he was nowhere near as shitty as Varka/Narse, who are both total narcissists. Of all the people in thar car to die, he was the worst option.